396 
intermediate pair in the fourth row somewhat more than half as 
long as the eyes. ' 
Antennæ (fig. 3a). They are very similar to those in P. vul- 
garis; the globulus seems to be slightly larger, 
Trunk (fig. 3 b). "Very slender. — The fifth pair of tactile 
setæ nearly twice as long as the breadth of the segment, rather 
thin and distally faintly pubescent. The fourth pair about four 
fifths of the last pair and very thin. The third pair is about two 
thirds as long as the fourth, its setæ (fig. 3c) increase considerably 
in thickness nearly from the base in about two thirds of their length 
and taper scarcely towards the end; the distal third seems to con- 
sist of many joints and the terminal one is very distinct; in the 
median part the division into ,,joints" is less distinct; the distal 
two thirds are clothed with short pubescence which near the end 
is not longer than at the middle of the seta, and its direction is 
rather oblique, not vertical on the seta. — The dorsal 'setæ on the 
two posterior segments are short, eylindrical. 
Anal Segment (fig. 3d). Its shape and the dorsal and ven- 
tral setæ almost as in P. vulgaris; the distance between the sub- 
median setæ is longer than between the submedian and intermediate 
pairs. — The styli åre considerably shorter than the submedian 
dorsal setæ (one of them 'is: misshaped and "very short). — The 
anal plate (fig. 3e) is about ås long as broad, narrowing conside- 
rably towards the base and with the hind margin almost straight; 
from each posterior angle originates a branch which is as long as the 
plate and shaped as a clavate hair (one of them is misshaped, short) 
and these two branches are rather diverging; seen from the side 
the plate shows itself to be rather thick and with two rudimentary 
branches projecting from the lower side of the hind margin inside 
the lateral branches. 
Legs.' Almost as in P. vulgaris, but a little more robust 
(fig. 3 f) than generally met with in that species. 
Copulatory "Organs:  Somewhat shorter and thicker thån in 
P. vulgaris, otherwise almost as in that species. 
